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Scattering-matrix analysis of ferrite-coupled line circulator

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2 Author(s)
Yang, L.-Y. ; Sch. of Optoelectron. Inf., Univ. of Electron. Sci. & Technol. of China, Chengdu ; Xie, K.

The conditions for the optimal non-reciprocal operation of longitudinally magnetised ferrite-coupled line (FCL) are obtained for the first time from the scattering-matrix treatment, and the necessary conditions for the multicomponent reciprocal network joint with a FCL section to be a circulator are specified. Using these optimal conditions, the minimum length of the FCL is also found. A self-biasing circulator with the minimum length of FCL at millimetre-wave frequency is reported and its scattering characteristics are simulated and discussed.

Published in:

Microwaves, Antennas & Propagation, IET  (Volume:2 ,  Issue: 6 )